Something similar happened to me. Utility company called me with important news about my account. I called them back later and the other department had no record of this call even though it was correct information. So weird.
I'm glad that as far as I know, a lot of the services I make use of - utilities, phone, bank, etc - rarely if ever need any interaction.
I got a letter the other day (yes, snail mail) from my bank (which is one of the more technologically forward ones out there, I've worked for them (as a developer-for-hire) for a couple of years). They said they were rejigging an investment account product I'm using, but all they mentioned is that I should go to the webapp for it and it'll tell me more.